No matter what you do it will never be big enough. How big is your mill? It will never be big enough. Start with a floor model drill press.
Exactly.
When I started I thought I needed that too... Soon realized that was a mistake - maybe used it twice a year and mostly for non-firearms work.. Gave it to my son..
If you really need to start small, get a GOOD mill/drill unit that has the X/Y axis table... It will be ok for small jobs until you can obtain a good mill...